Changed weatherservice mention to Typicode (SharePoint#3349)

* Changed weatherservice mention to Typicode

The documentation mentioned to be having the same call into the weatherservice while in fact the sample was calling into the Typicode service. Updated the text so it's aligned with the sample.

* Renamed weather variable name to response in samples

Also renamed weather variable name to response variable name in the code

Author: KoenZomers

docs/spfx/connect-to-anonymous-apis.md

@@ -15,16 +15,16 @@ When building SharePoint Framework solutions, you might want to consume public A
 
 ## Connect to anonymous APIs using the HttpClient
 
-The easiest way, to connect to anonymous APIs in your SharePoint Framework solutions, is by using the HttpClient provided as a part of the SharePoint Framework. For example, to get weather information for London from the public OpenWeatherMap service, you would execute:
+The easiest way, to connect to anonymous APIs in your SharePoint Framework solutions, is by using the HttpClient provided as a part of the SharePoint Framework. For example, to get dummy information from the Typicode service, you would execute:
 
 ```ts
 this.context.httpClient
   .get('https://jsonplaceholder.typicode.com/todos/1', HttpClient.configurations.v1)
   .then((res: HttpClientResponse): Promise<any> => {
     return res.json();
   })
-  .then((weather: any): void => {
-    console.log(weather);
+  .then((response: any): void => {
+    console.log(response);
   });
 ```
 
@@ -41,8 +41,8 @@ this.context.httpClient
   .then((res: HttpClientResponse): Promise<any> => {
     return res.json();
   })
-  .then((weather: any): void => {
-    console.log(weather);
+  .then((response: any): void => {
+    console.log(response);
   });
 ```